NAVAIR 17—2OAX—737
NOTE
For the following tests, set the spectrum analyzer frequency span and center frequency
controls as necessary to check the level of the harmonics of the TI signals.
4.14.4 Set the TI FREQUENCY MHz switches to the following settings. At each setting, verify that the
harmonics (using the spectrum analyzer tuned to the TI frequencies and its harmonics) of all the selected TI
frequencies are ~30dB below the carrier level.
TI
FREQUENCY MHz
Switches Setting
108.000
115 .000
130.000
145.000
157.000
4.14.5 Set the TI FREQUENCY MHz switches to 329.000.
4.14.6 Set the TI FREQUENCY MHz switches to the following settings. At each setting, verify that the
harmonics, (using the spectrum analyzer tuned to the TI frequencies and its harmonics) of all the selected
TI
frequencies are ~30dB below the carrier level.
TI
FREQUENCY MHz
Switches Setting
329.000
332.000
335.000
4.14.7 Set the TI FREQUENCY MHz switches to 070.000.
4.14.8 Set the TI FREQUENCY MHz switches to the following settings. At each setting, verify that the
harmonics (using the spectrum analyzer tuned to the TI frequencies and its harmonics) of all the selected TI
frequencies are 20 dB below the carrier level.
TI
FREQUENCY
MHz
Switches Setting
070.000
075.000
079.000
4.14.9 Set the TI FREQUENCY MHz switches 334.700 MHz.
4.14.10 Set the spectrum analyzer for a frequency span of 5 kHz/div, the resolution bandwidth to 300 Hz,
the video bandwidth to 10 Hz, and the reference level and position controls as necessary for a
single—sideband noise measurement at ±20kHz from the TI 334.700 MHz carrier frequency.
4.14.11 Verify that the single—sideband noise level is ~74 dB below the carrier level.
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